Thermostatic device



' March 21, 1939. i B. F. WADDELL v THERMOSTATIC DEVICE Filed March 25, 1936 2 sheets-'sheet 1 ATTORNEYS March 21, 1939. B. F. wADDELL.

THERMOSTATIC DEVICE 2 Sheets-Sheet 2 Filed March 25, Y 1936 INVENTOR ATTORN EYS faz L Patented Mar. 21, 1939 UNITED' {srr ammi' THERMOSTATIC DEVICE A y Benson F. Waddell, Jackson Heights, N. Y., as

signor to The Wileolator Company, Newark,

N. J., a corporation of Delaware Y Application Mal-cn 25, 193e, Semin. roses 14 Claims.

' This invention relates to thermostatic regulators for gas ranges. and particularly to a regu lator for that use which includes both a thermostatically actuated valve, .controlling the rate o! iiow oi gas, and a manually actuatedvalve by `which the flow of gas may be turned on or cut on -at will. Y One of the features of the invention involves the provision of, a novel constructionof the cutoff valve and v the parts associated therewith. 'I'his includes a rotatable valve-member having a longitudinal passage therethrough and an. adjustment means extending, through this longitudinal passage and employed for adjusting the connection. between the thermostatic element of, the regulator and the valve by which the rate of ow of gas is regulated. The cut-oil valveand the regulating valve are mounted in a casing havfing a seat for the cut-on valve and a gas port opening into the seat, and the cut-01T valve and adjustment means together deilne a gas way extending along the adjustment -means to the interior oi' the casing and adapted to connect the regulating valve and the gas port when the cut-V off valve is in its on position. The gas way may be conveniently provided by forming the cut-off valve with a lateral opening which is mov-- able into and out of alignment'with the port by rotation of the valve, and mounting the adjustmentmeans in the cut-oil valve with a clearance between the i adjustment means and the wall of the longitudinal passage, the clearance' forming a gas way -in the cut-ofi' valve extending inwardlyI along the adjustment means from the lateral opening and communicating at its inner end with the regulating valve.` Preferably, the vcut--o valve and the thermo-responsivev element for the regulating. valve are mounted at opposite ends of the casing, and the adjustment means includes an actuator connected to the regulating valve and disposed betweenthe cut-oil.' valve and the thermo-responsive element, the actuator being operable by the element through a connection which is adjustable by rotation of the adjustment means.

This assemblage. of the cut-oil! valve and the adjustment means'exten'ding therethrough may beso formed as to provide a gas-tight seal between the adjustment means and the vouter end of the gas way. A portion of the adjustment means or of an enlargement thereon may have a frusto-conical surface cooperating with a similar surface on the interior of the cut-ofi valve, these surfaces ,fitting togetherso tightly as to make an effective gas-tight seal.

(ci. 23e-15) t l Anotherv feature of the invention resides in the provision of means for effecting the connection of the regulator to the manifold pipe of the range. For this'purpose, a nippleis employed which is adapted. to be secured to the'manii'old pipe, pref'- erably by screwing it into an opening provided in the pipe. This nipple is .arranged to facilitate connecting the regulator to it with a gas-tight joint by a simple mechanical operation, as the tightening of a pair of screw-bolts. Such a construction has many advantages. The nipple may be very short and thereforethe handle of the `regulator may be in line with the gas-cocks of ,the range, as is desirable from the standpoint of appearance. Also, the nipple may be assembled on the manifold before the latter is mounted on I the range. With that done, the mounting of the regulator involves. only inserting it through an opening 'in the front plate of the range and attaching its casing vto the nipple with the bolts provided for the purpose, and the joint so made possesses all of the requisite strength.` Fux'ther more, by this construction the regulator may be a different regulatorl may be substituted without requiring detachment of the nipple.

' detached at any time for inspection or repair and Another feature of the improved regulator in- 1 volves the' construction and arrangement ot the two handles, one for -effecting regulation of the positions. These two handles are in axial alignment, andthe handle for the shut-off valve is at the front; the connections from this handle to the shut-off valve extend over the other handle for effecting the regulation. Such a construction isV convenient and compact `and may be of attractive appearance and permits of making the regulator in such form that it may be mounted in position by inserting it through an opening of correspondingsize provided for its reception in the front plate of the range.

These and other features of the improved reg--y ulator will be better understood by'reference to the following description taken in connection with the accompanying drawings which show the preferredembodiment of the invention.

In these'drawings: r Fig. 1 lsaverti'caLlongitudinal, sectional view; Fig. 2 is a top plan 'view;

Fig. 3 is adetailed, sectional view on line 3 3 of Fig. 1; f y Fig. 4 is a similar vview on line l-I oi' Fig. 1; Fig.`5 is asimilar view on line l--l of Fig. 1;

valve for temperature adjustment, and the other 30 Y ior turning the shut-oir valve to open and closed otact with the shoulder I3.'

'whichaccemmaybehadtothevalve of another form of the invention;

A Pig. '1 is a plan view of the valve operating and adjusting means of the form shown in Fig. 6;

Fig. 8 is a horizontal, sectional view on the e 3-3 of Fig. 6;

Fig. 3 is a transverse, vertical, sectional view on line 3-3 of Fig. 6;

Fig. 10isasimilar view on line |3|3 of Fig. 6;'

Iig. 11 is a similar view on line of Fig. 6;

Fig. 12 is afront elevation of a blank used in forming a portion of the manually operated valve mechanism; and,

Fig. 13 is a front elevation of the latch plate in the form shown in Figs. 6 to 8.

The regulator is preferably of the type vemploying'a thermo-responsive liquid contained in a closed system including a bulb located within the oven, a flexible metal tube extending from the bulb to the exterior of the oven, and an expansible and contractable chamber connected to the outer end of the tube. A regulator of this type is the features of the invention may be employed in thermostatic regulators of other types.

Referring to the drawings, the bulb adapted to be mounted within the oven is shown at I and the tube leading therefrom at 2. At its outer end this tube is connected to the regulator casing or a part mounted thereon. This casing is shown at 3 and it is adapted to be secured as hereinafterdescribed to the manifold 4 of the range. At its rear end the casing 3 is provided with an opening over which is secured a cup 3, and a flexible metal bellows 3' is sealed within this cup to form an annuiar space lbetween the sup and bellows con-l stituting an expansible and contractable chamber. The end of the cup .3 issealed by a gasket 3 located between a iiange 3 on the cup and an annulus I3. A disc lies against the closed endI of the bellows anda rod I2 secured at its end to this disc extends through the central opening in the annulus I3. A spring I3 is arranged between thedisc andannulus |3 andtendstokeepthe bellows expanded by urging the rod |2 toward therlghtasshqwnfnm.1. e

Beyond the annulus I3, the rod' i2 is provided with a threaded portion |4. A square nut or actuator il is arrangedon the threaded end of the rod and the iiat sides -I3 of the nut lie adjacent theinnersides ofasquaresleeve |1. Thenutis provided with a reduced end forming a shoulder I3 and a bimetallic compensating thermonatic lever llisldlptedtoenwetheshoulder. The mdotth'ethermostaticleverisplercedtotover the reduced portionofthe nut Il and to have loverispivotallysupportedonapin23andbe- `yuminugpivotai.animatainitiiertenz lor the valve-member 22. This valve-member 22y cooperates with a valve-seat 23 formed in the casing to form 'a regulating valve. The valvememberisurgedtowsrditsseat'byacoilspring 24 engaging the valve-member and a valve-cap llwhichclosesanopeninginthecasingthrough The chamber .23 formed on the outlet side of the `'c .iveisrlovidedvvithovutletopenings21onopnositesidesasshowninl'ig.2of`thedraw1n8a` ltheroftheseopeningsmaybeconnecdtoa totheovenburnersinotshown) otherclosedbyaplug. fiheprovision allowsgreaterexibiiiiy Inf.

Pig. 6 is a vertical, longitudinal, sectional view i installing the device on various types of stoves in which the position of the oven with respect to the stove top may be reversed in some instances.

The square sleeve I1 is connected to an adjust-d ing device which may take various forms but which in the form illustrated comprises a rod or shaft. 23 which projects through the front of the valve casing and receives a handle 33 to permit adjustment of the regulator. In the forward portion of the valve casing is a conical section forming a seat for the rotatable valve-member 3| of a cut-off valve. This valve is provided with an inlet opening 32 adapted to be aligned with the inletpipewhenthe valve is in open position. This cone-shaped valve-member 3| and the correspondingly shaped portion of the casing forming its seat have their larger end s toward the rear of the device or away from lthe handle.

The gas inlet of the regulator is through a nipple 33 connected with the manifold 4 by threads as shown and having the casing of the regulator secured to it by bolts 36 as such a construction presents the advantages referred to above. 'I'his nipple 33 is externally threaded and is screwed into the manifold pipe 4 before the latter is mounted on the' range and at the time when the gas cocks of the top burners are connected to the manifold. Also the nipple may be quite short with the result that the regulator may be so close to the-manifold as to have its handle in line with the burner handles across the front of the range. The nipple 33 has an enlarged and flanged lower end 34 recessed to receive a gasket 35 which aids in forming a gaswith aligned openings adapted to receive screws 33 to secure the valve casing to the fitting.

The valve-member 3| is operated by a handle 31 which is arranged on a reduced extension of the -regulator handle 33. As shown, the valvemember 3'| extends beyond the end of the casing 3, and is provided with a threaded portion 38. A disc 33 is secured to this threaded extension by jam nuts 43. The disc 33 is provided with a pair of diametrically spaced notches 4| adapted to receive the ends of arms 42 secured to and ex'- tending rearwardly from the handle 31. When the handle 31 is turned, turning the disc 39, the plug valve 3| will also be turned. Locking means are provided for maintaining the valve in the off position and preventing accidental operation thereof. As shown, the arms 42extend in the rear of the disc 33 and are provided with forked ends to receive a spring member 43 which is ,mounted on the valve-member 3| back of the of the valve casing.' To release the valve operating means, slight pressure is applied axially of the valve casing moving the end. of the spring member 43 out of the latch and permitting rotation of the valve-member. The control means .of valve-member 3| is also provided with a stop to prevent movement beyond its fully opened position. As shown. the valve casing is provided with a shoulder 43 adapted to engage a corref sponding shoulder 41 formed on a cup-shaped member l43 which'is retained in position on the valve-member 3| Yto rotatetherewith by the jam nuts 43. The cup-shaped member 43 abuts a stems and valve extensions. V vention I provide an adjusting means which per'- 45 mits theuse of a rod 29 of uniformleng'th. As

65 laysl spring 84.

snouider :s formed at the maar end' or the threaded portion 38 of thevalve-meniber 3|. A

spring 50 is mounted in the cup-shaped member between it and the valve casing and normally urges the valve assembly and operating mechanism toward the front of the valve casing.

The arms 42 may be connected to the handle 31 in either of two positions to permit the gas cock handle of the presentdevice to be arranged in the same way as the gas cock handles of the top burners oi' the range. gas cock handles are so placed that the off position is horizontal while in others it is vertical. In the drawings the gas cock handle of the present 15 apparatus is shown in a .vertical position when the valve is open but itmay also be arranged in a horizontal position. As Vshown in` Fig. lV the handle 31 is recessed to receive 4a ring 5I carried by arms 42. This ringis provided with radially extending projections 52 adapted to be received in similar recesses in the body portion of the handle. The handle is provided with four ofsuch recesses 53 (see Fig. 5) arranged at 90 from each other. By placing the projections 52 in one set of recesses 180 apart, the handle may be so posiwhen in the off position.

The handle 30 is connected to the rod or shaft 29 to provide adjustment of the position of the manually operated parts with respect to the valve casing. There is considerablevariation in the distance between the manifold and the front panel of differentltypes of ranges and it is even true that this distance will vary in individual ranges of the same model. This means that the position of the operating handles must be changed' 40 with respect to the valve in .order to produce an assembly that ispleasing. Heretofore such variations have necessitated different lengths of In the present ine shown. the disc 39 is adapted to be aligned with the front panel 54 oi' the range. A-dlal 55 is Narranged on` the rod 29. immediately forwardv of y v marker (not show'n) onthev front panel. The 55 handle 30 is provided with a metallic central threaded insert `.'56 which engages threads on the 4 end of rod 29. Dial 55 is clamped between two washers 53-and 59. 'I'he forward washer is providedwith a-square central opening adaptedto receive a squared vend. 30 of the insert 53. The

vwasher 59 is provided with keys 5I engaging key ways 62 in the rod 29. The dial. ls held between the washers byascrews 63 which secure the washers to each other. It is urged-outwardly on the rod 29 I provide means-for lubricatingthe valvemember 3| to prevent it from sticking. As shown, the latch -plate 45 is carried bya boss 35 on the y bottom of the valve casing.. lThis boss is provided with sin-inclined bore 58 threaded at its outer end to Vreceive a screw 31. The inner end of the bore communlcatesfwith the' valve casing ad- Q .Iacenttheplugvalve It will be apparentithat this bore may be filled withgrease or other lubrisant and the lubricant may beforced into the valve casing by moving the screw 61 inwardly. The grease thus placed in the valve casing can be distributed along the valve-member 3|, by moving the valve assembly Vback and forth. Pressing inwardly on the. handle 3,1 causes the valve assembly to move and springs 50 and 34 return the'parts to their original position.

In operation, the valve-member 22 is pressedv Vtoward the closed position by spring 24. When the oven is to be set fora desired temperature, A10 In some instances the rotation oi' handle 30 moves the nut Ilalong the threaded portion I4 of rod I2 and the shoulder I8 bears against the thermostatic lever I9 causing it to open the valve-member against the tension of the spring. by rotating tle valve-member 3| and' the oven 4 lighted, as the temperature of the oven rises,

the thermo-responsive liquid -in bulb expands, thus compressing the bellows 6 against the tension of spring I3, moving the'shoulder I8 of nut I0 AI5 and permitting the thermostaticvlever I9 to move-under the -pressureof spring 24. This causes the other end.v of the lever to move toward the right, permitting the valve-member 22 to adjust itself to cut down the supply of gas. a.n

Upon a drop in temperature in the oven the bellows expands and Acauses the valve-member to increase the supply of gas. .The lever I9 connecting theV valve-member to the rod I2 is a blmetallic thermostat and serves as' a compensat 30 -ing thermostat to oiset theeect of temperatures outside the oven on the device. It will be apparent that a portion of tube 2 and annularspace 1 containing the thermo-responsive liquid are f outside the Aoven and are subject to changes of 354 temperature caused, for instance, by lighting the top burners of the range. In the absence of a compensating thermostat these extraneous vtemperatures wouldcause false operation ofthe valve-member 22. The bimetaLllic lever I9. howo ever, isset to operate against the main thermostatic element and inasmuch as it is also exposed otherwise be imparted to the valve-member 22 by s i the eilect of extraneous temperatures upon the Apnrtions'of the mainthermostatic element outside the oven.A -1

The adjustment of the .thermostatic element is lmade through the handle 30 in the manner here- 50 tofore described and the main gas cock is opened and closed by manipulation of the handle 31 in the manner heretofore described. The construction and arrangement of parts facilitates the conj nection of the valve assembly to the manifold 5 and permits the fitting -sa idee attaciiedid the i manifold at the same time as the ilttings used for the gas cocks ofthe main top burners. As stated,` I

this can be done before the manifold is assembled on the range and the valve casing may then be. so

readily connected to the fitting-by thepscrews-36: The adjustability Voi! the dial and handle assembly on the end of the rod 29 Vpermitsthe parts j 'to be adiusted with respect to the fmnr'panei n.

\The parts are so arranged that the handle 33V 65 and the handle 31 may be aligned with the handles ofthe gas cocks of the main top burners proparts if the valve should stick. i

In theform of the invention shown in Figs.. 6

to 1s of nie drawing'atnegednstmetion of [the 1 main thermostatic element-the valve caaingithea regulating valve and associatedpartsis substan- If the gas cock is opened 16 tially the same as that heretofore described and similar reference numerals are applied to like parts. In Fig. 6 I have shown'the casing provided with a small opening 25 to which a suitable connection maybe made (not shown) to deliver sufllcient fuel to operate a pilot burner. This is a feature of usual construction in devices of this character and the form of the invention illustrated in Figs. 1v to 5 may also be provided with a pilot opening of this type.`

The rod or shaft 29 is constructed substantially as heretofore described in connection with Figs. 1 to 5 but the valve arrangement is of a different form and the means for controlling the valve andthe means for adjusting the connections between the main thermostatic element and the regulating valve are modified. As shown a valve# member 18 surrounds the rod 29 and this valve is of the cone type, with its larger end towardthe i'ront. It is provided with an opening 1| communicating with an inlet port 12 in the casing. As shown, the inlet port is adapted to' be connected to the manifold 4 by a fitting 13 generally similar to that shown in Fig.1. In the fitting shown in Fig. 6, however, the recessed gasket seat is omitted and a gasket 14 is arranged between the adjacent surfaces of the valve casing and the fitting. The iitting is threaded into an opening in the manifold as shown and is secured to the valve casing by screws r The rod 29 is provided with an enlargement 18 which fits within the bore of the valve-member' 18. 'Ihe valve-member 18 is retained against the bore of the casing by a coil spring 16 which abuts against a shoulder 11 formed on the extenor -of the valve-member and against a latch, plate 18 which is secured to the valve casing by screws and is stationary. 'I'he construction of this latch plate is shown in Fig. 13 of the drawings. As shownI it is provided with openings 19 forthe fastening elements and is further provided with diametrically opposed notches 88 which cooperate with a yoke to. lock-the valve in the off position. The latch plate is also provided with a pair of lugs or ears 8| that stick up from the surface of the latch plate and are adapted to secure a key plate 82 (see Fig. 12) in position. The key plate is in the form of a disc provided with diametrically opposite flattened portions 88 and with a pair of diametrically opposite ears 84 arranged between the flattened portions. It is also provided with a central opening 88 having enlargements 88. When these two plates are assembled the plate 82 is rstturned 45 in a clockwisedirection from the position shown in Fig. 12 to bring the enlargements 88 in alignment with Vthe ears 8| and is then turned counter-clockwise 45 to the position shown in Fig. 12 to brlngthe outer edge over the notches 88 of the latch plate 18 as shown in Fig. 6. AThe flattened portions 88 may be turned to be in alignment with .notches 88 for the removal of the arms 81.

I 'Ihe latch plate 18 and the key plate 82 cooperate with arms 81 by means of which the valve- `extended portion of the valve-member isl flattened on opposite sides at 88 as. shown in Fig. 11

" and the disc 88 is provided with a central open- The ends of the arms 81 are oiset inwardly as indicated at 95 -(see Fig. 9) and are adapted to be received in the notches 88 of the latch plate against the key-plate 82 when the valve-member is in an olf position to prevent accidental open# ing of the valve-member. To open the valvemember the handle is pushed inwardly against the tension of spring 93 to remove the ends 95 of the arms from the notches 80. 'I'he valvemem ber may be then turned toward the open position. The disc 88 may be provided with an extension 88 containing suitable indicia to indicate that the valve is open and the arm 81 which is in the upper position when the valve is closed may be provided with suitable indicia as indicated at 91 to show that the valve is in the olf position.

The thermostatic regulating means consists of a suitable calibrated drum 98 mounted between .the plug disc as and the base of the arms s1. As

V28 and is keyed to the rod as indicated at' |02.l

The drum is provided with a recess at its forward end adapted to receive a collar |88 which is mounted on an intermediate portion |84 of the sleeve 8'9. This collar is provided with a threaded opening to receive an adjusting screw |85 which engages the sleeve 88. \By loosening the screw the drum may be adjusted on the lsleeve for calibrating the instrument.

The outer end of the rod 29,is threaded and as shown in Fig. 8 a nut IIII is arranged on the threaded portion of the rod. A spring |81 surrounds the rod between this nut and the adjacent lendof the valve member. This exerts an outward pressure on the rod to retain the enlargement 18 member.

The operation of this form of the invention will be apparent from the foregoing description. Actuation of the arms 81 through the handle 82 permits opening and closing of the manually operated valve-member 18 and the connection betweenv the main 'thermostatic element 'and the regulating valve-member 22 is adjusted i'or any desired temperature by turning the drum 88 to rotate the rod 28 and thus adjust the nut I8 on the threaded end of the rod I2.

. It will be apparent that in the two illustrated forms of the invention, the adjustment meam including the elongated device 28 and the actuator I5 serves the dual function of adjusting the temperature setting of the regulating valve and partly defining a sealedA gas way in the cut-of! valve extending inwardly along the adjustment means from the lateral opening in the cut-oil.' valve and communicating at its inner end with the regulating valve. By arranging the cut-oil' valve and the thermo-responsive element I2 at oppositel ends oi' the casing and locating the actuator I8 for the regulating valve between them, I provide a compact construction in which` cut-oil valve is rotated to turn on the latter valve,

the actuator `may be operatively connected to both the thermo-responsive element and the adl justment device 29 throughsimpleand direct connections. y 111' each of the illustrated forms oi'lthe invention, the part 29 of the adjustment means is fitted closely in the front part of the cut-oil! valve `so that there 1s considerable friction-between these two parts, and since the actuating' nut I5 offers but slight resistance 5to turning. oi' the adjustment means, the friction causes the adjustment means to turn with the cut-of! valve. Accordingly, the adjustment dial may be set to a desired temperature when the cut-oil! valve is in its "o position, and, when the handle for' the the dial and other parts of the adjustment Imeans will move with the handle and remain at the desiredI setting. However, when the adjustment dial is turned, the adjustment means moves independently ofthe cut-of! valve, because the latter is held against movement by its tight fit in the casing. It will be understood thatV the sepa.- 'rate handle for the adjustment m ans may be omitted, if desired, and the tempera ure adjust- 'ment effected by the movement of the `ptrt 29 f with the cut-oil valve, in which case the lateral opening in the side wall of the cut-oil.' valve is elongated circumferentially so that the handle for the cut-oil? valve may be`turned through a considerable angle to move the adjustment means to the desired temperature setting without closl ing the cut-01T valve. When this construction i is, employed, the adjustment means is rotated ing through its side wall, a control means`passingl through the valve member and rotatable relative thereto. the member and rod being formed to .provide a gas passage between them from said opening through the inner end of the valve member, a casing provided-with a. seat for the vkalve member and an opening through the seat adapted to cooperate with the opening in the valve member, an operating device for moving'said openings into and out of alignment, a gas regulating valve vforcontrolling flow 4through saidvalve member andcomprising'a seat and a valve` member movable'relatively to the seat, the casing having a gas passage therein leading from said last valveA member to said end of the ilrstvvalve member, a thermo-responsive means connected to the regulating valve for'regulating the relative .positions oi' its valve member and seat, and means whereby the turning of the control means eflects an adjustment ofthe relation between said thermostatic element and the gas regulating valve.

2. A thermostatic. controller comprising the combinationof Va tubular valve member having, an opening through its side wall intermediate its ends, a rod passing through the tubular member and rotatable relative thereto, the rodand mem- .ber being formed to provide a space between them leading from said opening out through the inner end of the valve,v member and vsurfaces onthe member and rod on the opposite end ,of said valve member coacti'ng to iorm a gas-tight seal,

a casing provided with a seat for the valve inem-` cooperate with the opening in the valve member, an operating device for moving said openings into and o tot alignment, a gas regulating valve for contro ling tlow through said valve member and comprising a seat on the casing and a valve member movable relatively to the seat, the casing having a gas passage therein leading -from said last valve member. to said rst end of the tubular valve member, a thermo-responsive means connected to the valve for regulating the relative positions of lts valve member and seat,

a handle independent of said operating device cooperate with said port, a' handle for turning the valve to control the flow of gas into and through the valve, a regulating valve in the casing controlling the flow of gas passing through the hollow cut-oil valve, the: casing having a gas passage leading from the regulating valve to said central opening in the cut-ofi valve, athermostatic` element controlling the operation of the regulating valve, and an operating device passing through theA hollow cut-oil valve into said passagey for adjusting the relation between the therintatlc element and the regulating valve independently ofthe cut-oil! valve and fitted in said central opening with a clearance between said device and the edge/of said central opening.`

4. In a gas oven control, a casing having a cone-shaped valve seat therein and having a port i'or the admission of gas, a hollow cone-shaped cut-ofi! valve therein having a central opening ,throughl one end thereof and an opening in its side wall cooperating with said port, a handle concentric with the valve and connected to it for turning it relatively to itsseat, a regulating valve in the casing controlling the flow of gas passing through the hollow cut-ofi' valve, the casing having a gas passage leading froml the regulating valve to said central opening in the cut-oi! valve, a thermostatic element controlling lthe operation oi' said regulating valve, a regulating means for -adjusting the relation between the thermostatic -element and the regulating valve independently of said cut-oil.' valve, said means passing through the cut-oi! valve into said passage and being iitted in said central opening with a clearance between said means and the edge' o f the opening to permit flowr o! gasthrough said endofthe cut-oir valve and-along said means said means closing theopposite end of the cut-on valve, and a handle for operating said regulating means mounted concentric with the-handle of the cut-oil! valve.

thermostat at the rear end of the casing, a valve actuator in the casing, an adjustable `connection between the actuator 'and-thermostat, a hollow cut-oil valve arranged in the ,front end of the casing and having an opening through its side wall and a central opening through its rear end, a port in the side wall of the casing cooperating with said side opening in the cut-olf valve, rotatable adjustment meansgextending through the cut-oi! valve for adjusting said connection,'sa id means being iitted inithe central opening in the cut-cd valve with aclearance between said means the regulating valve, means at the front end of the casing for operating said adjustment means,

and means for actuating the cut-off valve ar,

ranged concentrically with said adjustment means and operable independently thereof.

6. In a thermostatic controller comprising a casing, a thermo-responsive valve in the casing,

a rod projecting from the casing and rotatable to adjust the valve, and a shut-olf valve concentric with the rod and operable to control the passage of gas through the iirst valve, the combination of a collar keyed to the .projecting part of the rod and removable oi the end thereof, manual operating means for the shut-off valve located near the end of the rod and operable to secure the collar against removal therefrom, said last means being removable from the casing, releasable locking means for securing the manual means against removal from the casing, and a dial secured to the collar and adjustable thereon to calibrate the controller, said collar, dial and manual means being removable from the casing upon release of said locking means.

'1. In a thermostatic controller comprising a casing, al thermo-responsive valve inthe casing, a rod projecting from the casing and rotatable to adjust the valve, and a' cut-oil' valve concentric with the rod and operable to control the passage of gas through the thermo-responsive valve, the combination of a handle for the rod, saidhandle being mounted on the .rod and movable off one end thereof, a plate disposed on one side oi the handlevbetween the handle and casing and operatively connected to the cut-on valve, a handle for the cut-ofi valve on the opposite side of the nrst handle and concentric therewith and rotatable independently thereof, said second handle being removable from the casing and securing the first handle against removal from the rod, connecting means between the second handle and the plate extending over the nrst handle and projecting, beyond the plate toward the casing,

said projecting portion of the connecting means having a part extending at substantially right angles to the body of the connecting means, and a locking plate supported by the casing and rotatable relative thereto and having a part of its periphery located in front of and in alignment with said part of the.connecting means to secure the second handle against removal, the locking plate being rotatableto move said parts out of alignment and thereby permit removal of said handles.

8. In a device of the character described comprising a cut-off valve, a thermo-responsive regulating valve controlling flow through the cut-off valve, a casing for said valve, and an operating device for adjusting the thermo-responsive valve and removable from the casing, the combination of a handle operatively connected to the cut-off valve and securing the operating device against removal from the' casing, said handle being displaceable axially and removable from the casing, a latch plate securedto the casing inback of the handle and provided with a peripheral slot, a key plate rotatably mounted in front of the latch plate and having a part adapted to cover said slot,

- and a member on the handle having a part engazing the back of the key plate to secure the handle against removal and disposed in said slot to secure the handle against rotation, the handle being movable axially to remove said part from the slot and permit rotation oi the handle, and the key plate being rotatable to uncover the slot and permit removal of the handle and operating device.

9. A thermostatic controller comprising the combination of a valve member having an opening through its side wall, a rod passing through the valve member and rotatable relative thereto, the member and rod being formed to provide a. sas` passage between them from said opening to the inner end of the valve member, a casing provided with a'seat for the valve member and an opening through the seat adapted to cooperate with the opening in the valve member, the rod'v being tted in said inner end of the valve member with a clearance between the rod and valve member and having a part projecting inwardly beyond said end into the casing, the casing being provided with a chamber surrounding said projecting part of the rod and forming a continuation of said gas passage, a gas regulating valve in the `casing for controlling ilow through said valve member and communicating with the inner end of said chamber, adjustable thermo-responsive means for actuating the regulating valve and located in said chamber between the inner end of the cut-oil valve and the rear end of the casing, means' connected to said projecting part of the rod in the chamber whereby turning of the rod eiects an adjustment of the regulating valve, and operating devices outside the casing for independently actuating said rod and valve member.

10. A thermostatic controller comprising a casing having an elongated passage extending through the front end thereof, a hollow cut-oil valve iltted-tightly in the front part of the passage and rotatable therein and having an opening in its side wall, the casing having a port leading, into said passage and cooperating with said opening, an operating device in front of the casing ior rotating the cut-oil valve to move said opening and port into and out of alignment, the cut-olf valve having an axial bore therethrough leading into said passage, a thermo-responsive element in the casing located in said Apassage in back of the rear end of the cut-oi! valve, a regulating valve in the casing for controlling ow through the cut-oil? valve,a connection between the thermo-responsive element and regulatingvalve, a rod extending through said bore into the passage and sealing the front end oi the bore and rotatable therein, the rod having a clearance with the wall of the rear part of the bore to permit the'flow of gas along the rod between said opening andthe rear part ofthe passage, and means in the rear part of the passage operatively connecting the inner end of the rodto said flrst connection, whereby rotation 0i.' the rod adjusts the regulating valve.

11. In a gas regulator, a casing having a valve seat in the front end and a gas port opening into the seat, a hollow cut-on' valve coacting with the seat and rotatable in the casing, the valve having a lateral opening and a longitudinal paselement to control the rate oi flow through the cut-,oil valve and including a valve member' and valve passing through the passage in the cut-of! valveand'mounted for rotation therein independently of the cut-ofi' valve with aclearance between the adjustment means and the wall ofregulating valve and located between the cut-oil.

valve and the thermo-responsive element and havinga threaded connection with said element,

whereby rotation of said imeans .adjusts the threaded connection and varies the relation between the thermo-responsive element and the actuator.

12. In a gas regulator, a casing having a valve seat and a gas port opening'i'n'to the seat, a hol- `low cut-ofi valve in they casing coacting with the seat and rotatable in the casing, the valve having a lateral opening through its side wall intermediate its ends and adapted vto align with said port, the valve also having a longitudinal passage therein extending from said lateralopening toward the inner end of the valve, a handle for turning the valve to move said lateral opening into and out oi alignment with the port, a manually adjustable vtemperature regulating valve in the casing controlling the iiow of gas passing through the cut-oil? valve and including a valve member and a s eat, a thermo-responsive element controlling the operation oi the regulating valve and located in the casing beyond theA forming a gas way along the adjusting means between the regulating valve and the lateral opening in the cut-ofi valve, and an operative connection between the inner part of said adjusting means and the' regulating valve ior adjusting the regulating valve when said adjusting means rotated.

` 13. In a gas regulator. a having a valve seatand agas port opening into the seat, a hollow cut-off valve in the casing coacting with the seat and rotatable in the casing, a manually adjustable temperature 'regulating valve in the casing for controlling ilow through the cut-01T valve and l including a valve member and a seat, a thermoresponsive element controlling the regulating valve and located inthe casing beyond the inner end ofthe cut-oivalve, adjusting means extending through the cut-off valve generally parallel to the axis*l thereof, the adjusting means being mountedr for rotation independently of the cut-off valve and defining with the cut-off valve a gas way extending partly along the adjusting means, the gas way being adapted to connect said port with the regulating valve, a handle for turningthe cut-oil valve to move a part of said gas way into and out of alignment with the port, and an operative connection between the inner part of said adjusting means and the regulating valve to adjust the regulating valve when the adjusting means is rotated.

14. In a gas regulatona casing having a valve seat and a gas portV opening into the seat, a hollow cut-off valve in the casing cacting with the seat and rotatable 'in the casing, a manually adjustable temperature regulating valve in the casing for controlling iiow through the cut-oil valve port with the regulating valve. a handle for turning the cut-ofi valve to move a part of said gas way into and out of alignment with the port,

and an operative connection between theinner.

part of said adjusting means and the regulating valve to adjust the regulating valve when the adjusting means is rotated.

' BENSON F. WADDELL. 

